Aggr function in qlikview

[prasoon92]

Hi guys ,

I need your little help.

I have start_time of different jobs in my model and I want to generate the average start time for these jobs.

Can anyone help?

Starttime of jobs is in format 7:23:05 AM

Thanks in advance.

[felipedl]

With only this information, a simple avg(starttime) with the job dimension should do the job.

What are you trying to get on the graph your using.

[prasoon92]

I just need the data in the pivot table. I need to calculate the avg start time. But I am not getting appropriate result using above expression.  Some of the jobs have null start time values which I need to exclude. There are multiple jobs that are forming a source so I need to aggregate that and where ever there are null entries for the job start run I need to exclude that.

Suppose the job timings for a month are 12:40:00 AM , 12:20:00 , NULL, 11:00:00 AM then I need avg of These timings  . But I am getting results like 9 am.

I am using the below expression

.

Aggr(time((avg(num(starttime))),jobid)

Can anyone help me with the correct expression.

[felipedl]

You need to use another avg for your expressoin:

avg(Aggr(avg(num(starttime)),jobid))

Just the: Aggr(time((avg(num(starttime))),jobid)

will get you a temporary "table" with the results of the avg by jobid.

[prasoon92]

Actually i am looking for a way to exclude the null values using some set expression. If you could help

[felipedl]

Example of what the aggr will do.

Lets say you have this dataset:

Data:
Load * inline
[
     Date,JobId,starttime
     01/01/2018,JobA,9:45
     02/01/2018,JobA,7:50
     01/01/2018,JobB,19:45
     04/01/2018,JobB,7:50
     05/01/2018,JobC,9:45
     01/01/2018,JobC,7:50
]

And you use the expression:

avg
(
    aggr
    (
          sum(starttime),
          JobId
    )
)

What this will do first is sum(starttime) grouped by JobId, giving the following:

JobId	sum(starttime)
	62:45:00
JobA	17:35:00
JobB	27:35:00
JobC	17:35:00

And then apply the avg on this table, getting

JobId	avg ( aggr ( sum(starttime), JobId ) )
	20:55:00
JobA	17:35:00
JobB	27:35:00
JobC	17:35:00

Which is different from doing the avg(starttime), which gets the following:

JobId	avg(starttime)
	10:27:30
JobA	08:47:30
JobB	13:47:30
JobC	08:47:30

This is because of the number of fields of the count(JobId) when doing the aggregate:

JobId	sum(starttime)	Aggr Avg	Count Aggr	Normal Avg	Normal Count
	62:45:00	20:55:00	3	10:27:30	8
JobA	17:35:00	17:35:00	1	08:47:30	3
JobB	27:35:00	27:35:00	1	13:47:30	2
JobC	17:35:00	17:35:00	1	08:47:30	3

So the aggr will exclude the null or blank values, since it cannot do the sum on them.

Hope its a little clearer now.

Felipe.